Tool for removing dowel washers from the dowel



K. KOVACS 3,401,444

TOOL FOR REMOVING DOWEL WASHERS FROM THE DOWEL Sept, 17, 1968 Filed Oct.51, 1966 J'ne/zTZor J Era Qfoaaoa MAX R? KRAU5ATTY United States Patent3,401,444 TOOL FOR REMOVING DOWEL WASHERS FROM THE DOWEL Karoly Kovacs,3514 S. Laramie Ave., Cicero, Ill. 60650 Filed Oct. 31, 1966, Ser. No.590,964 3 Claims. (Cl. 29239) ABSTRACT OF THE DISCLOSURE A tool forremoving a split dowel washer from a dowel, which tool has a pair ofmembers movable with respect to each other, with each member having ahandle portion and a jaw member with the jaw shaped complementary to thedowel washer and with one of the jaw members having a rib to engage thesplit in the dowel washer to spread the washer for removal from thedowel.

This invention relates to a tool for use in removing dowel washers fromthe dowel.

One of the objects of this invention is to provide a tool for use ineasily and readily removing a dowel washer from a dowel.

Dowel washers are used in connection with dowels in retaining the hubsecured to the ring plate. The hub carries the axle. In use the dowelWashers become swedged to the dowel so that it is difficult and at timesimpossible to remove the dowel washer when it is desired to remove thehub and axle. This is eliminated by the present invention in that thetool is applied to the dowel washer to firmly engage it and to readilyremove the dowel washer.

This invention may be used for removing dowel washers from dowelswherever used.

Other objects will become apparent as this description progresses.

In the drawings:

FIGURE 1 is a perspective view of the tool forming this invention.

FIGURE 2 is an enlarged view showing the jaws of the tool in a reversedposition from that of FIGURE 1.

FIGURE 3 is a view of the dowel and the dowel washer which the tool isto operate on.

FIGURE 4 is a sectional view showing the do'wel and the dowel washerconnected to the part from which it is to be removed.

FIGURE 5 is a view partly in section showing the jaws of the toolapplied to the dowel washer when removing the dowel washer.

FIGURE 6 is a view taken on line 6-6 of FIGURE 5.

FIGURE 7 is a view taken on line 7--7 of FIGURE 5 but showing theposition of the jaws before it engages the dowel washer, and

FIGURE 8 is a view taken on line 8-8 of FIGURE 5 but showing the jaws infully clamped position.

The tool forming this invention is generally indicated at 10 andcomprises a pair of members generally indicated at 12 and 14 connectedtogether by a pin 16 to operate in much the same manner as a plier. Themember 12 has a handle portion 18, an intermediate body portion 20 and ajaw 28, all integrally formed. The member 14 has a handle portion 24, anintermediate portion 26 and a jaw 22. The intermediate 'body portions 20and 26 are each approximately one-half the width of the member so thatthey are positioned adjacent each other and the pin 16 connects or joinsthe two members together. The foregoing structure is conventional topliers and like tools.

The invention here resides in the shape and construction of the jawmembers generally indicated at 22 and 3,401,444 Patented Sept. 17, 196828. The jaw member 2-8 has a rear section which has a partialcylindrical shaped surface 30. The jaw continues forwardly and the frontor mouth portion of the jaw is recessed to provide a steppedconfiguration comprising a vertical end wall 32 and a conical taperedrecessed surface 34 which conforms to the exterior shape of the dowelwasher to be described.

The other jaw member 22 is shaped similarly to the jaw 28 just describedand has a rear section which has a partial cylindrical shaped surface 36and a front or mouth portion provided with a vertical end wall 38 and aconical tapered recessed surface 40. The jaw 22 has a longitudinallyextending slot 42 which receives a rib or wedge member 44 which extendsinto the mouth of the jaw. The rib or wedge element 44 is anchored tothe jaw 22 by pins 45. The rib or wedge member extends the full lengthof the mouth and partially into the rear section of the jaw. The exposededge of the rib or wedge member 44 has tapered surfaces forming aknife-like edge 46.

One of the uses of the dowel and dowel washer shown here is inconnection with an axle shaft and the means for connecting the hub ofthe axle shaft to the ring plate. As shown in FIGURE 4, the hub 50 hasan axle shaft (not shown) afiixed to it. The hub has spaced openings 52which are conically tapered to receive the dowel washers generallyindicated at '54 as well as the dowel or studs 56. The ring plate 58 hasspaced openings 60 with which the openings 52 of the hub 50 are alined.The dowel 56 is externally threaded at its opposite ends as at 61 and 62but has an intermediate smooth surface as at 63.

The dowel is positioned in the alined openings 52 and 60. A nut 64 issecured to the threaded end 62 of the dowel. The dowel washer 54 is asleeve-like member having an inside smooth cylindrical surface 66 and anoutside frusto-conical shaped surface or wall 68. The sleeve body of thedowel washer has a slot 70 which provides a split sleeve body. The dowelwasher 54 is positioned on the dowel 56 with the dowel washer inengagement with the smooth surface 63 of the dowel. The dowel and dowelwasher are then inserted into the conically tapered opening 52 in thehub 50 so that the dowel washer rests within the conical tapered opening52. The dowel extends through the opening 60 in the ring plate 58 and issecured by the nut 64. The opposite end of the dowel extends exteriorlyof the hub 50. A fiat washer 72 is positioned on the dowel adjacent thedowel washer and a threaded nut 74 is secured to the dowel.

In usage the dowel washer becomes so fixed and secured to the dowel thatit becomes difficult to remove the dowel washer from the dowel when thehub has to be detached from the ring plate. The dowel 56 cannot beremoved since the inside threaded nut 64 is inaccessible. With the dowelwasher 54 fixed to the dowel the hub 50 cannot be removed until thedowel washer is removed from the dowel. This, however, is readilyaccomplished with the tool of this invention. The exterior threaded nut74 is unthreaded and removed from the dowel as is the fiat washer 72.The ring plate 58 is hit with a sledge hammer to cause the axle shaft tomove outwardly away from the hub 50 and then the axle shaft is pushedback to its initial position causing the dowel washer 54 to separate alittle from the hub sufficiently to permit the front of the jaws of thetool to engage the dowel washer.

The rib or wedge element 44 in the jaw engages the slot 70 in the dowelwasher 54 and manual pressure on the handles 18 and 24 will cause therib to enter the slot 70 and enlarge the slot and thereby spread orenlarge the sleeve body sufficiently so that it loosens from the smoothportion 63 of the dowel 56. The front or mouth portions of the jaws areshaped complementary to the frusto-conical shape of the dowel washer sothat they completely walls 32 and 38 of the jaws" and the portions ofthe jaws grip the dowel washer with'the rib or wedge member 44 =enteringthe slot of the dowel washer. The threaded portion 61 of the dowel willextend into the rear portions 30 and 36 of the jaws but the rearportions of the jaws will not be in engagement therewith when the jawsare in clamping position, as can be seen in FIGURE 5.

With this firm interlock on the dowel washer and the dowel washerloosened from the dowel, the dowel washer may be readily removed fromthe dowel so that the hub 50 (an axle) can be removed from the dowel andring plate 58. Thus, the tool provides a very simple, inexpensive andefiicient method of removing dowel washers from the dowel.

While the invention has been described in connection with a dowel washerused for a hub and ring plate, it will be understood that it may be usedin connection with dowel washers wherever used.

It will be understood that various changes and-modifications may be madefrom the foregoing'without departing from the spirit and scope of theappended claims.

What is claimed is:

1. A tool for removing a dowel washer which has a frusto-conical shapedouter surface and a split from a dowel when same has ben fixed theretothrough usage, said tool including a pair of members movable withrespect to each other, each member having a handle portion and a jawmember, each jaw member having a front section and a rear section, withthe front section having a conical tapered recessed surface and avertical end Wall engage the dowel washer, as shown in FIGURE 5. The"outer end" of the'dowel washer seats "again's'tthe" vertical to engagethe dowel Washer and in which one of the jaw 'mr'fib'ersha's a rib'toengage the split in the dowel washer to spread the dowel washer. J

2. A structure defined in claim 1 in which the rear section of each jawmember has a partial cylindricalshaped surface to accommodate the dowelwhich may extend threinto. f

3. A tool for removing asplit dowel washer from a dowel when same hasbeen fixed thereto through usage, said tool including a pair of membersmovable with respect to each other, each member having a handle portionand a jaw member, eachjaw member having a front section and a rearsection, with the front section shaped complementary to the shape ofthe: dowel washer to engage the dowel washer and in which one of the jawmembers has a. rib to engage the split in the dowel washer to spread thedowel washer, the rear section of each jaw member having av partialcylindrical-shaped surface to accommodate the dowel which may extendthereinto, with said surfaces out of engagement with the dowel when thejaws are closed.

References Cited UNITED STATES PATENTS 1,923,199 8/1933 Hackney 815.1' X2,415,896 2/1947 Marsh et al s1 5.1 X 2,832,128 4/1958 Erdmann 29/229FOREIGN PATENTS 781,550 8/1957 Great Britain.

MILTON s. MEHR, Primary Examiner.

